CN113202778A

CN113202778A - Electric pump

Info

Publication number: CN113202778A
Application number: CN202110527162.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2021-08-03
Anticipated expiration: 2037-08-23
Also published as: US11384776B2; CN113202775A; EP3674562A1; EP3674562B1; CN113202776B; CN113236576A; CN113202778B; CN113202774A; CN113202775B; JP7476095B2; EP3674562A4; CN113202773A; JP2020537726A; US20200355187A1; KR20200041952A; CN113202777B; KR102322609B1; CN109424551A; CN113202777A; CN113202776A

Abstract

An electric pump comprises a pump shell, a rotor assembly, a stator assembly and an electric control plate assembly, wherein the electric pump is provided with a first cavity and a second cavity, the rotor assembly is arranged in the first cavity, the stator assembly and the electric control plate assembly are arranged in the second cavity, an isolation sleeve comprises a bottom, the bottom comprises an upper surface and a lower surface, the lower surface is closer to the electric control plate assembly than the upper surface, the electric pump also comprises a heat dissipation plate, the isolation sleeve is provided with a pump shaft limiting part, except the pump shaft limiting part, the lower surface of the bottom is in contact with the heat dissipation plate or except the pump shaft limiting part, and heat conduction silicone grease or heat conduction silicone is filled between the lower surface of the bottom and the heat dissipation plate; the electric control board assembly comprises a substrate and heating electronic components, at least part of the heating panel is in direct contact with at least part of the heating electronic components, or heat-conducting silicone grease or heat-conducting silicone rubber is filled between at least part of the heating panel and at least part of the heating electronic components; the heat dissipation of the electric control board assembly is facilitated, and the service life of the electric pump is prolonged.

Description

Electric pump

[ technical field ] A method for producing a semiconductor device

The invention relates to a fluid pump, in particular to an electric pump.

[ background of the invention ]

The automobile industry develops rapidly, and with the development of automobile performance towards safer, more reliable, more stable, full-automatic intelligent and environment-friendly energy-saving directions, the electric pumps are widely applied to automobile heat management systems and can well meet the market requirements.

The electric pump comprises an electric control unit, the electric control unit comprises an electric control board assembly, and for a high-power pump, the electric control unit can generate heat during working, and the heat is accumulated to a certain degree and cannot be timely dissipated to influence the performance of the electric control board assembly, so that the service life of the electric pump is reduced.

[ summary of the invention ]

The invention aims to provide an electric pump which is beneficial to heat dissipation of an electric control board assembly, so that the service life of the electric pump is prolonged.

In order to achieve the above purpose, one embodiment of the present invention adopts the following technical solutions:

an electric pump comprises a pump shell, a rotor assembly, a stator assembly and an electric control plate assembly, wherein the pump shell can form a pump inner cavity, the pump inner cavity is divided into a first cavity and a second cavity by an isolation sleeve, the rotor assembly is arranged in the first cavity, and the stator assembly and the electric control plate assembly are arranged in the second cavity; the insulation cover includes the bottom, the bottom includes upper surface and lower surface, the lower surface is closer to than the upper surface automatically controlled board subassembly, its characterized in that: the electric pump also comprises a heat dissipation plate, and at least part of the heat dissipation plate is arranged between the electric control plate and the lower surface; the heat dissipation plate and the pump shell are arranged in a split mode, and the heat dissipation plate is fixedly connected with the pump shell; the heat dissipation plate is made of a metal material;

the isolation sleeve is made of a metal material and is formed by stamping and stretching; the isolation sleeve further comprises a side wall, the stator assembly is sleeved on the outer periphery of the side wall, the rotor assembly is arranged on the inner periphery of the side wall, and the thickness of the side wall is smaller than or equal to that of the bottom; the isolation sleeve is provided with a pump shaft limiting part, the pump shaft limiting part is formed at the bottom and protrudes towards the second cavity, the heat dissipation plate is provided with a through hole corresponding to the pump shaft limiting part, the pump shaft limiting part penetrates through the through hole, except for the pump shaft limiting part, the lower surface of the bottom is in contact with the heat dissipation plate, or except for the pump shaft limiting part, heat-conducting silicone grease or heat-conducting silicone is filled between the lower surface of the bottom and the heat dissipation plate;

the electric control board assembly comprises a substrate and heating electronic components, and at least part of the heating electronic components are arranged on the front surface of the substrate; at least part of the heat dissipation plate is in direct contact with at least part of the heating electronic components, or heat conduction silicone grease or heat conduction silicone rubber is filled between at least part of the heat dissipation plate and at least part of the heating electronic components.

In the technical scheme of the application, the electric pump further comprises a heat dissipation plate, the isolation sleeve is provided with a pump shaft limiting part, the heat dissipation plate is provided with a through hole corresponding to the pump shaft limiting part, and the pump shaft limiting part penetrates through the through hole, so that the height of the whole pump is favorably reduced relatively, and the structure of the whole pump is more compact; in addition, in the technical scheme of the application, except for the pump shaft limiting part, the lower surface of the bottom of the isolation sleeve is in contact with the heat dissipation plate, or except for the pump shaft limiting part, heat-conducting silicone grease or heat-conducting silicone rubber is filled between the lower surface of the bottom of the isolation sleeve and the heat dissipation plate; therefore, on one hand, the pump shaft is limited, and on the other hand, the heat transfer rate between the heat dissipation plate and the isolation sleeve is favorably accelerated, so that the heat dissipation efficiency between the heating electronic component and the heat dissipation plate is favorably improved; in addition, in the technical scheme of the application, the electric control board assembly comprises a substrate and heating electronic components, at least part of the heat dissipation board is directly contacted with at least part of the heating electronic components, or heat-conducting silicone grease or heat-conducting silicone rubber is filled between at least part of the heat dissipation plate and at least part of the heating electronic components, because at least part of the heat dissipation plate is directly contacted with at least part of the heating electronic components, or heat-conducting silicone grease or heat-conducting silicone rubber is filled between at least part of the heat dissipation plate and at least part of the heating electronic components, thus being beneficial to relatively shortening the path of transferring the heat of at least part of the heating electronic components to the heat dissipation plate and accelerating the heat transfer rate between the heating electronic components and the heat dissipation plate, thereby being beneficial to improving the heat dissipation efficiency between the heating electronic components and the heat dissipation plate, and further be favorable to the heat dissipation of automatically controlled board subassembly to be favorable to improving electric pump's life.

[ description of the drawings ]

FIG. 1 is a schematic cross-sectional view of a first embodiment of the electric pump of the present invention;

FIG. 2 is a schematic cross-sectional view of a second embodiment of the electric pump of the present invention;

fig. 3 is a schematic perspective view of the heat sink in fig. 1 or fig. 2;

fig. 4 is a schematic cross-sectional view of the heat sink plate of fig. 3;

FIG. 5 is a schematic perspective view of the first housing of FIG. 1 or FIG. 2;

fig. 6 is a perspective view of the electronic control board assembly and the bottom cover of fig. 1 or 2 without being assembled;

FIG. 7 is a schematic perspective view of the electrical control panel assembly of FIG. 1 or FIG. 2;

FIG. 8 is a cross-sectional view of the electrical control panel assembly of FIG. 7;

FIG. 9 is a schematic sectional view showing a third embodiment of the electric pump of the present invention;

FIG. 10 is a schematic sectional view showing a fourth embodiment of the electric pump of the present invention;

fig. 11 is a schematic perspective view of the electrical control panel assembly of fig. 9 or 10;

FIG. 12 is a cross-sectional view of the electrical control panel assembly of FIG. 11;

FIG. 13 is a schematic illustration of a first embodiment of the spacer sleeve of FIGS. 1, 2, 9 and 10;

FIG. 14 is a cross-sectional view of the spacer sleeve of FIG. 13;

FIG. 15 is a perspective view of a second embodiment of the insulation cap of FIGS. 1, 2, 9 and 10;

fig. 16 is a cross-sectional view of the spacer of fig. 15.

[ detailed description ] embodiments

The invention will be further described with reference to the following figures and specific examples:

the electric pump in the following embodiments can provide flowing power for the working medium of the thermal management system of the automobile, and the working medium is a 50% glycol aqueous solution or clear water.

Referring to fig. 1, an electric pump 100 includes a pump housing, a rotor assembly 3, a stator assembly 4, a pump shaft 5, and an electric control board assembly 9, where the pump housing includes a first housing 1, a second housing 2, and a bottom cover 6, the first housing 1, the second housing 2, and the bottom cover 6 are relatively and fixedly connected, and the pump housing can form a pump inner cavity, in this embodiment, a first annular seal ring 10 is disposed at a connection portion between the first housing 1 and the second housing 2, and the structure of the disposed first annular seal ring 10 can prevent a working medium from leaking out at the connection portion, and at the same time, can prevent an external medium from leaking into the pump inner cavity; the electric pump 100 further comprises an isolation sleeve 7, the isolation sleeve 7 divides the inner cavity of the pump into a first cavity 30 and a second cavity 40, a working medium can flow through the first cavity 30, no working medium flows through the second cavity 40, the rotor assembly 3 is arranged in the first cavity 30, the rotor assembly 3 comprises a rotor 31 and an impeller 32, the impeller 32 is partially positioned in the isolation sleeve 7, the stator assembly 4 and the electric control board assembly 9 are arranged in the second cavity 40, and the stator assembly 4 is electrically connected with the electric control board assembly 9; in this embodiment, a second ring-shaped seal ring 20 is further disposed between the isolation sleeve 7 and the stator assembly 4, and the structure of the second ring-shaped seal ring 20 can form a second defense, so as to fully ensure that the external medium cannot penetrate into the second cavity 40.

Referring to fig. 1, the first housing 1 is an injection molded part and is injection molded with an inlet 11 and an outlet 12, when the electronic pump 100 operates, a working medium enters the first cavity 30 through the inlet 11, and then the working medium leaves the first cavity 30 through the outlet, when the electronic pump 100 operates, a connector (not shown in the figure) is inserted into a connector 80 of the electronic pump 100, so that a control circuit on the electronic control board assembly 9 is connected with an external power supply, the control circuit controls a current passing through the stator assembly 4 to change according to a certain rule, so as to control the stator assembly 4 to generate a changing magnetic field, the rotor 31 of the rotor assembly 3 rotates around the pump shaft 5 under the action of the magnetic field, so that the working medium entering the first cavity 30 rotates along with the rotor 31, and the working medium leaves the first cavity 30 due to a centrifugal force to generate a flowing power.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a first embodiment of an electric pump; the electric pump 100 further comprises a heat dissipation plate 8, the heat dissipation plate 8 and the pump housing are separately arranged, the separate arrangement refers to that the heat dissipation plate and the pump housing are two different parts formed by independent processing, of course, the pump housing can be formed by fixedly connecting 2 or more than 2 parts, and the heat dissipation plate 8 is fixedly connected with the pump housing; spacer 7 comprises a bottom 71, bottom 71 comprising an upper surface 711 and a lower surface 712, lower surface 712 being closer to electronic control board assembly 9 than upper surface 711, at least part of upper surface 711 being able to come into contact with the working medium in first chamber 30, at least part of lower surface 712 being exposed to the second chamber; at least part of the heat dissipation plate 8 is arranged between the electric control plate assembly 9 and the lower surface 712, and at least part of the lower surface 712 is in direct contact with at least part of the heat dissipation plate 8, so that heat conduction among the isolation sleeve 7, the heat dissipation plate 8 and the electric control plate assembly 9 can be better realized, the heat dissipation of the electric control plate assembly is facilitated, and the service life of the electric pump is prolonged; stator module 4 is connected with automatically controlled board subassembly 9 electricity, stator module 4 includes stator 41 and contact pin 42, heating panel 8 is located between stator 41 and the automatically controlled board subassembly 9, specifically, use stator 41 to be close to the one end of second casing 1 side as the upper end, the one end that is close to bottom 6 side is the lower extreme, heating panel 8 is close to the lower extreme setting of stator 41, the setting can make heating panel 8 more be close to automatically controlled board subassembly 9 setting like this, thereby be favorable to the heat dissipation of automatically controlled board subassembly.

Referring to fig. 2, fig. 2 is a schematic cross-sectional structure diagram of a second embodiment of the electric pump, compared with the first embodiment of the electric pump, a heat-conducting silicone grease or a heat-conducting silicone gel 90 is filled between at least part of the lower surface 712 of the bottom portion 71 of the spacer 7 and at least part of the heat dissipation plate 8, specifically, the lower surface 712 of the bottom portion 71 of the spacer 7 is coated with the heat-conducting silicone grease or the heat-conducting silicone gel 90, or a part of the heat dissipation plate 8 corresponding to the lower surface 712 of the bottom portion 71 of the spacer 7 is coated with the heat-conducting silicone grease or the heat-conducting silicone gel 90, which can prevent that when the lower surface 712 is processed to be uneven, the contact area between the heat dissipation plate 8 and the spacer 7 is reduced, thereby affecting the heat conduction among the spacer 7, the heat dissipation plate 8 and the electric control board assembly 9, and thus affecting the heat dissipation of the electric control board assembly 9; in this embodiment, other features of the electric pump are the same as those of the first embodiment of the electric pump, and are not described herein again.

Referring to fig. 3 to 6, the heat dissipation plate 8 is centrally provided with a central hole 81 and a plurality of relief holes 82, and the relief holes 82 are disposed corresponding to a portion of the pins 42 and a portion of the stator 41, so that structural interference caused when the heat dissipation plate is assembled can be prevented; the heat dissipation plate 8 is made of a metal material, specifically, copper; referring to fig. 6, the heat dissipation plate 8 is fixedly connected with the pump housing, specifically, the heat dissipation plate 8 includes a plurality of through holes 83, the through holes 83 are distributed in a circumferential array or uniformly distributed, the pump housing includes a plurality of columns 21, the columns 21 are distributed in a circumferential array or uniformly distributed, the columns 21 are integrally formed with or fixedly connected with the pump housing, the columns 21 are arranged corresponding to the through holes 83, and the heat dissipation plate 8 is fixedly connected with the pump housing by riveting the columns; in this embodiment, the heat dissipation plate 8 is fixedly connected to the second housing 2, the column 21 is disposed on the second housing 2, the column 21 is integrally formed or fixedly connected to the second housing 2, the through hole 83 is disposed corresponding to the column 21, and after the through hole 83 is disposed corresponding to the column 21, a part of the column 21 is still exposed, the heat dissipation plate 8 is fixedly connected to the second housing 2 by riveting the column 21, such that the heat dissipation plate 8 is more reliably connected to the second housing 2, and other connection methods are also possible, for example, the pump housing is formed with a plurality of threaded holes, the threaded holes are distributed in a circumferential array or uniformly distributed, the through hole 83 of the heat dissipation plate is disposed corresponding to the threaded hole of the pump housing, the heat dissipation plate 8 is fixedly connected to the pump housing by screws or bolts, and of course, the connection method can also be used by welding.

Referring to fig. 7 and 8, fig. 7 and 8 are schematic structural views of the electric control board assembly in fig. 1 and 2; the electronic control board assembly 9 comprises a substrate 91 and an electronic component 92, wherein the substrate 91 comprises a front surface 911 and a back surface 912, in the embodiment, the front surface 911 and the back surface 912 are arranged approximately in parallel, and the 'approximately' means that the front surface is taken as a reference surface, and the parallelism of the back surface is less than or equal to 1 mm; with reference to fig. 1 or 2, the front surface 911 of the substrate 91 is closer to the lower surface 712 than the back surface 912, a gap is formed between the front surface 911 of the substrate 91 and the heat sink 8, and at least a part of the electronic component 92 is disposed between the front surface 911 and the heat sink 8; specifically, the electronic component 92 includes a heat-generating electronic component (not shown in the figure), at least a part of the heat-generating electronic component is disposed on the front surface 911 of the substrate 91, and in this embodiment, the heat-generating electronic component includes a diode, a MOS transistor, an inductor, a resistor, a capacitor, and other common electronic components that easily generate heat; with reference to fig. 1 or fig. 2, a heat-conducting silicone grease or a heat-conducting silicone gel 90 is filled between at least a part of the heat dissipation plate 8 and at least a part of the heat generating electronic component (not shown in the drawings), specifically referring to fig. 7, at least the upper surface of the heat generating electronic component is coated with the heat-conducting silicone grease or the heat-conducting silicone gel 90, where the "upper surface" refers to a non-connecting surface of the heat generating electronic component and the electronic control board assembly 9, and of course, the heat-conducting silicone grease or the heat-conducting silicone gel 90 may be coated on the heat dissipation plate corresponding to the heat generating electronic component 92, so that the heat generated by the heat generating electronic component is conducted to the heat dissipation plate 8 through the heat-conducting silicone grease or the heat-conducting silicone gel 90, which is beneficial to improving the service life of the electric pump; with reference to fig. 1 or fig. 2, the coating height of the heat conductive silicone grease or the heat conductive silicone gel 90 is equal to the distance between the electric control board assembly 9 in fig. 1 or fig. 2 and the heat dissipation plate 8 in fig. 1 or fig. 2, so that the heat conductive silicone grease 90 can be fully ensured to be fully contacted with both the electric control board assembly 9 and the heat dissipation plate 8, the heat dissipation of the electric control board assembly is facilitated, and the service life of the electric pump is prolonged; of course, at least part of the heat dissipation plate 8 may be in direct contact with at least part of the heat generating electronic components, and specifically, the heat dissipation plate 8 may be processed into other shapes with different thicknesses according to the heights of the heat generating electronic components, so that the heat dissipation plate is in direct contact with the heat generating electronic components without coating heat conductive silicone grease or heat conductive silicone rubber, and the purpose of heat dissipation of the electronic control board assembly may also be achieved.

Referring to fig. 3 and 4, the material of the heat dissipation plate 8 is a metal material, in this embodiment, the material of the heat dissipation plate 8 is copper, the thickness of the heat dissipation plate 8 is greater than or equal to 0.2mm, specifically, in this embodiment, the thickness of the heat dissipation plate 8 is greater than or equal to 0.2mm and less than or equal to 1.5mm, so as to ensure the strength of the heat dissipation plate, which not only reduces the total weight of the electric pump, but also ensures that a certain space can be reserved between the heat dissipation plate and the heating electronic component to fill with the heat-conducting silicone grease or the heat-conducting silicone rubber, thereby achieving a good heat dissipation effect, of course, the thickness of the heat dissipation plate 8 can also be greater than 1.5mm, in this case, the heat dissipation plate 8 can be processed into other shapes with different thicknesses according to the height of the heating electronic component, and the heat dissipation plate 8 is in direct contact with the heating electronic component without coating the heat-conducting silicone grease or the heat-conducting silicone rubber. The heat dissipation plate 8 includes a first surface 85, where "the first surface" refers to a contact surface directly contacting the electric control plate assembly in fig. 1 or fig. 2 or an abutting surface of heat conductive silicone grease or heat conductive silicone gel coated between the first surface and the electric control plate assembly, and in conjunction with fig. 1, the first surface 85 directly contacts at least part of the heat generating electronic components in fig. 7, or in conjunction with fig. 2, a heat conductive silicone grease or heat conductive silicone gel 90 is filled between the first surface 85 of the heat dissipation plate 8 and at least part of the heat generating electronic components, and an area of the first surface 85 of the heat dissipation plate 8 is defined as a first area, and referring to fig. 7 and fig. 8, an area of the heat generating electronic components arranged on the front surface 911 of the substrate 91 and covering the substrate 91 is defined as a first area, an area of the first area is defined as a second area, and the first area is greater than or equal to the second area; this arrangement can sufficiently ensure a large contact area between the heat generating electronic component arranged on the front face 911 of the substrate 91 and the heat dissipating plate 8, thereby facilitating heat dissipation.

Referring to fig. 9 and 10, fig. 9 is a sectional structure view of a third embodiment of the electric pump of the present invention, and fig. 10 is a sectional structure view of a fourth embodiment of the electric pump of the present invention; referring to fig. 9 to 12, the electronic control board assembly 9 'includes a substrate 91' and an electronic component 92 ', the substrate 91' includes a front surface 911 'and a back surface 912', in this embodiment, the front surface 911 'and the back surface 912' are substantially parallel to each other, where "substantially" means that the front surface is taken as a reference surface and the parallelism of the back surface is less than or equal to 1mm, the electronic component 92 'is disposed on the back surface 912' of the substrate 91 ', the front surface 911' of the substrate 91 'is closer to the lower surface 712 of the bottom portion 71 of the insulating sleeve 7 than the back surface 912', the material of the heat dissipation plate 8 is a metal material, in conjunction with fig. 9 and 12, at least a portion of the heat dissipation plate 8 is in direct contact with the front surface 911 'of the substrate 91', or in conjunction with fig. 10 and 12, a portion of the heat conduction silicone grease or 90 is filled between the heat dissipation plate 8 and the front surface 911 'of the substrate 91', defining the area of the first surface 85 of the heat dissipation plate 8 in fig. 3 as a first area, in fig. 11, the area of the substrate 91 ' covered by the electronic component 92 ' is a first area, the area of the first area is a second area, and the first area is greater than or equal to the second area, compared with the first implementation of the electric pump, the positions of the electronic components mounted on the electric control board assembly in the third implementation and the fourth implementation of the electric pump are different, specifically, the electronic component 92 ' is disposed on the back surface 912 ' of the substrate 91 ', so that the axial size of the electric pump is more compact, and other features of the third implementation and the fourth implementation of the electric pump are the same as those of the first implementation of the electric pump, and are not repeated here.

Referring to fig. 13 and 14, fig. 13 and 14 are schematic views of a first embodiment of a spacer sleeve; the isolation sleeve 7 includes a side wall 70 and a bottom portion 71, and with reference to fig. 1 or fig. 2 or fig. 9 or fig. 10, the stator assembly 4 is sleeved on an outer periphery of the side wall 70, the rotor 31 is sleeved on an inner periphery of the side wall 70, the side wall 70 includes an inner surface 701 and an outer surface 702, the inner surface 701 is closer to a central axis of the isolation sleeve 7 than the outer surface 702 is, in this embodiment, the inner surface 701 and the outer surface 702 of the side wall 70 are both smooth, that is, neither the inner surface 701 nor the outer surface 702 is provided with other structures, although the inner surface 701 nor the outer surface 702 of the side wall 70 may also be provided with other structures; the bottom portion 71 includes an upper surface 711 and a lower surface 712, the upper surface 711 is closer to the opening side of the isolation sleeve 7 than the lower surface 712, in this embodiment, the upper surface 711 and the lower surface 712 of the bottom portion 71 are both smooth surfaces, that is, no other structure is provided on the upper surface 711 and the lower surface 712, although the upper surface 711 and the lower surface 712 of the bottom portion 71 may also be provided with other structures; in the present embodiment, the thickness of the sidewall 70 is equal to or less than the thickness of the bottom 71, where "the thickness of the sidewall" refers to the vertical distance between the inner surface 701 and the outer surface 702 of the sidewall 70, and "the thickness of the bottom" refers to the vertical distance between the upper surface 711 and the lower surface 712 of the bottom 71; the thickness of the side wall 70 is less than or equal to that of the bottom 71, so that on one hand, the strength of the bottom 71 of the isolation sleeve can be ensured, and on the other hand, in combination with fig. 1, the thin side wall is more favorable for heat conduction among the working medium, the side wall of the isolation sleeve and the stator assembly, so that the heat dissipation of the stator assembly is facilitated, in the embodiment, the thickness of the side wall 70 is less than or equal to 1.5 mm; the isolation sleeve 7 is made of a stainless steel material, specifically, the isolation sleeve 7 is made of an austenitic stainless steel material, the isolation sleeve 7 is formed by stamping and drawing a metal plate, the isolation sleeve 7 is provided with a pump shaft limiting portion 72, the pump shaft limiting portion 72 is formed at the bottom 71, with reference to fig. 1 or fig. 2, the pump shaft limiting portion 72 protrudes towards the second cavity 40, the heat dissipation plate 8 is provided with a through hole corresponding to the pump shaft limiting portion 72, the pump shaft limiting portion 72 penetrates through the through hole and is positioned with the heat dissipation plate 8, specifically, with reference to fig. 3, the through hole, which is formed by the heat dissipation plate 8 and corresponds to the pump shaft limiting portion 72, is a central hole 81 of the heat dissipation plate 8, with reference to fig. 1 or fig. 2, except for the pump shaft limiting portion 72, the lower surface 712 of the bottom 71 is in contact with the heat dissipation plate 8, or heat conduction silicone grease or heat conduction silicone is filled between the lower surface 712 of the bottom 71 and the heat dissipation plate 8 except for the pump shaft limiting portion 72; set up like this and make to have sufficient area of contact between separation sleeve bottom and the heating panel or guarantee that it has heat conduction silicone grease or heat conduction silica gel as much as possible to fill between bottom and the heating panel, be favorable to the heat-conduction between separation sleeve, heating panel and the automatically controlled board subassembly three to be favorable to the heat dissipation of automatically controlled board subassembly.

Referring to fig. 15 and 16, fig. 15 and 16 are schematic views of a second embodiment of a spacer sleeve; the spacer 7 'is provided with a pump shaft limiting portion 72', the pump shaft limiting portion 72 'protrudes toward the second cavity 40, an annular concave ring 73' is formed on the lower surface 712 of the bottom portion 71 ', and with reference to fig. 1, the pump shaft 5 is fixedly connected with the pump shaft limiting portion 72', except for the annular concave ring 73 ', the lower surfaces 712' of the bottom portion 71 'are both in contact with the heat dissipation plate 8, or except for the annular concave ring 73', heat conduction silicone grease or heat conduction silicone rubber is filled between the lower surface 712 'of the bottom portion 71' and the heat dissipation plate 8.

Referring to fig. 1, 2, 9 and 10, when the electric pump works, the first cavity 30 is filled with a working medium, on one hand, as shown in fig. 1, the spacer 7 is in direct contact with the heat dissipation plate 8, or as shown in fig. 2, a heat conductive silicone grease or a heat conductive silicone rubber is filled between the bottom 71 of the spacer 7 and at least a part of the heat dissipation plate 8, and on the other hand, as shown in fig. 9, the electric control board assembly 9 'is in direct contact with the heat dissipation plate 8, or as shown in fig. 10, a heat conductive silicone grease or a heat conductive silicone rubber 90 is filled between the electric control board assembly 9' and the heat dissipation plate 8, so that the spacer 7, the heat dissipation plate 8 and the electric control board assembly are in direct or indirect contact with each other in sequence, so that the working medium indirectly takes away a part of heat of the electric control board assembly 9, and heat dissipation of the electric control board assembly 9 becomes more efficient.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. An electric pump comprises a pump shell, a rotor assembly, a stator assembly and an electric control plate assembly, wherein the pump shell can form a pump inner cavity, the pump inner cavity is divided into a first cavity and a second cavity by an isolation sleeve, the rotor assembly is arranged in the first cavity, and the stator assembly and the electric control plate assembly are arranged in the second cavity; the insulation cover includes the bottom, the bottom includes upper surface and lower surface, the lower surface is closer to than the upper surface automatically controlled board subassembly, its characterized in that: the electric pump also comprises a heat dissipation plate, and at least part of the heat dissipation plate is arranged between the electric control plate and the lower surface; the heat dissipation plate and the pump shell are arranged in a split mode, and the heat dissipation plate is fixedly connected with the pump shell; the heat dissipation plate is made of a metal material;

2. The electric pump of claim 1, wherein: the radiating plate is made of copper and comprises a first surface, at least part of the first surface is in direct contact with at least part of the heating electronic components, or heat-conducting silicone grease or heat-conducting silicone rubber is filled between at least part of the first surface of the radiating plate and at least part of the heating electronic components; the area of the first surface is a first area, the area of the heating electronic component covering the substrate is defined as a first area, the area of the first area is a second area, and the first area is larger than or equal to the second area.

3. The electric pump according to claim 1 or 2, characterized in that: the heating panel includes a plurality of through-holes, the through-hole is circumference array distribution or evenly distributed, the pump casing includes a plurality of stands, the stand is circumference array distribution or evenly distributed, the stand with pump casing integrated into one piece or fixed connection, the through-hole with the stand corresponds the setting, makes through the riveting the stand the heating panel with pump casing fixed connection.

4. The electric pump according to claim 1 or 2, characterized in that: the heating panel includes a plurality of through-holes, the through-hole is circumference array distribution or evenly distributed, the pump casing is formed with a plurality of screw holes, the screw hole becomes circumference array distribution, the through-hole with the screw hole corresponds the setting, the heating panel with the pump casing passes through screw or bolt fixed connection.